Radiator control for steam heating systems



May 14, 1940. J. w. wl-:s-r

RADIATOR CONTROL FOR STEAM HEATING SYSTEMS Filed Nov. 5, 1957 INVENTOR BY, "f' .n

A ORNEY 2 Sheets-Sheet 1 May 14, 1940. J. lw. WEST RADIATOR CONTROL FOR STEAM HEATING SYSTEMS Filed Nov. 5, 1957 2 Sheets-Sheet 2 RNEY I 'l'll UNITED STATE Patented May 14, 19404 SYSTEMS STEMHEATING `John W. West, Maplewood, N. o Application November 5, 1937, serial No. `172,931 24 claims. (C1. 236-37) l Thepresent invention relates to improvements in a `multiple steam heating system of the generaltype in which the individual radiators therel ofi are supplied with steam from a common source' at greater vthan atmospheric pressure, and it has a,

particular relation to an individual automatic or semi-automatic temperature controll mechanism for each of such radiators.,` e

An object ofthe present invention a, simpleand inexpensive automatic `temperature control mechanism for the individual radiators of alrnultiple steam heating system, which is op-` erated by fluctuations inthe temperature of the i room in which said mechanism is located, for regulating thesupply of steam `to its directly connected radiator of a multiple steam radiator heating system. f l

l which is operated by iiuctuations in the temper-` Another objectof the invention is the provision fot a simple and inexpensive semi-automatic temperature control `mechanism forthe individual "radiators of a multiple steam heating system,

`ature of the room `in which saidmechanism is mechanism for the individual radiators of a mullocated, for` regulatingthe supply of steam to its directly connected radiator of a multiplesteam radiator heating system.

Afurther object of the `invention is to provide a simple `and inexpensive temperature control ,M `mechanism for the individual radiators of a multiple steam radiator heating system which will `permit variations and maintenance of different temperatures in the individual radiators thereof` independently of the steam pressure in said system. v

Another object of `,the invention isto provide Va simple `and inexpensive temperature control tiple steam heating system which is easily and quickly installed in conventional steam heating systems, and which `is substantially free of movingparts, delicate controlmechanisms requiring `outside sources" of operating power, etc. l

A further object of the invention is `the provision of automatic temperature controls for the individual radiators of a multiple steam radiator heating system, which are applicable to conventional types of multiple steam radiator heating systems without material` change or `al teration.

" Another object of the `invention is toprovide an` automatic or semi-automatic temperature control for the individual radiators of a multiple steam radiator heating system, which is exceedl `ingly simple to regulate, viz: change or otherwise lvary the temperature settings without requiring is to` provide the use of toolsor the services of a mechanic or other skilled technician.

Alurther object of the invention is the pror vision of` a simple and inexpensive pistonA type` sleeve valve which is capable of being fitted to E the casing` of ,a conventional globe type control Valve on installed steam radiator heating systems quickly and "efficiently without` requiring material changes `or alterations in said systems.` l Other` and further objects `and advantages of the invention will -be apparent` from the follow'- ingy description, wherein several forms of the invention areldescribed and shown in detail, ref- `erence being had to the accompanying drawings forming a part thereof, wherein like numerals indicate like parts, in which:

Fig. l isafragmentary front elevational view of one Vform of `apparatus which the invention may` assume;

Fig. 2 is an enlarged fragmentary cross-sece tional view of the heat control unit shown in` Fig. 1 of. the drawings;

, Fig. 3 is a fragmentary sectional View of the upper partof the apparatus shown in Fig. 2, illustrating the relative position of its various parts `When the piston is in itsextreme upper position;

Fig. 4 is an 'enlarged perspective view ofthe sleeve member or casing, shown in Fig. 2;

Fig. 5 is a'longitudinal sectional view similar to Fig. 2, but showing the piston'rnounted in the sleeve member or casing in an inverted position;

Fig.` 6 is a longitudinal sectional view, partially in elevation, of a. condenser, the same being provided with a conventional'bi-metallic temperature control for thermostatically opening `and/or fclosing the atmospheric discharge vent; i Fig. 7 is another form of `the invention, where inthe individual radiators are provided with la plurality of automatic heat control units constructed inaccordance with the invention, and

`a telescopic condenser which permits variations in `its size, thereby resulting in changes in the "temperature control for its respective radiator Fig. 8 is ardiagrammatic View of a multiple steam heating system,` having the individual radiators thereof provided with heat control units constructed in accordance with` the present invention; and

. Fig. 9'is an enlarged vertical sectional view `of With reference to the drawings, and particularly Fig. 8,` there is shown a multiple steam ithe control valve on the atmospheric discharge` y vent of the condenser chamber, the same being taken along the line 9--9 of Fig. 1.

l radiator heating system in which the individual diameter projecting t'ubell to be' mounted theretion consists of a cylindrical outer sleeve member or casing i8, having intern'iediate its ends ya laterallyprojectirig land circufrnierentially ext tending ange 29, and an externally threaded shoulder portion 22 immediately below and ad'- j'acent the underside of said flange ,rmember 29.y

.The sleeve member or casing i8 isalsoeprvided with a pair of diametrically opposite inlet ports kor apertures 2Q, extending entirely throughthe sides thereof between the threaded shoulder portion 22 and the lower edge'l thereof.: vThe vup"- per end 28 of the sleeve member or casing-i3 is also threaded internally, asA indicated rat 2g AVto :receive la, threaded *cap member hereinafter to be described. 'Y 1, l :AS b GSt'sh fwn jFig. v a` hollow: l cylindrical 'piston .member djhaving au close'dupper end orl head "32` and fan fopen bottom end'A :tenis slidably mounted within the sleeveI or casing` member i8. Thejclosed upper end V3 2v ofthe piston 3@ is provided with anaxial aperture vor opening St, having outwardly projecting flangedfshoulder 38 extending circumferentia'lly thereof. The shoulder 318 isj'internally .threaded for receiving a corre- `s'pondingly threaded endv of a relatively Vsmall in,y saidfprojecting tube mis of "a length sufcient to extend a substantial distance beyond the sleeve "eisten 'en therein.

i8 and cap member Q2I at all positions of vthe' The cap member a2 le proviedfer eieeing the 4open top of vthe sleeve or Kcasing |'8, l and has a downwardly projecting cir'curnfi"e'rentially extending outer flange ed, which isle'xtern'ally 'threaded vfor mounting onntlie inte nal threads '2% of the up'per end Eil of the sleeve `I'r'iez'nlo'er or casing it.

,The cap y'member:'42isalsoprovided witha central ai'ierture Aili, having a 'downwardly extending axially projecting vinner 'flangeh which is 'threade'dto receive a correspondingly threaded en d of a connecting condenser pipe Radial lgrooves 52 are'provided inthe bottom of `the outer flange .t4 of the 'capjmemb'er '42 for facilitating lthe passage ordrainage of the condensaftfiori water in vthat portion 'ovf'tl'ieV system thereabove, the water 'passing `thro'ugli the'grooves 52 over ltheftop'of Nthe piston Sil Aand downwardly between lthe sidewalls thereof and the sleeve I8 `into the `rvalvefcas'ing i3, ar'idthen back into the `pipe I2y and into the boilerfl'l.

Referring now to Fig. llof the drawings, acondenser'is slfiown connected to the opposite end ofthe connecting condenser pipefd, which 'condenser 55 'is in the form of 'aI kofllovvcylindrical tank of substantial surface area in proportion vto the supply of steam thereto. The condenser A55 has ,ha relatively. small atmospheric discharge :opening or vent 56,.at thel opposite Vend thereof :trmite inletvfpipe v48. The opening or vent 56 lsfprovidd with a valve member 58 of any ysuitable construction, which is adapted to entirely `closexthe opening or to vary its size, whichever ;ta'il yin Fig.f9 is Amounted within'fa valve t casing "59, and 4i's Vprovidedwitlretnatiospltieric discharge epening N6 I`. The valve 58 lis directly connected indie memberlfrwhich in turn is direct- 'Iy ohct a Iiti 1' `il'lflical-I 62. A

graduated scale or temperature indicia E4 is mounted'directly behind the pointer $2 for indicating the particular setting of the valve 58 `for obtaining a certain room temperature. In other words, the sine of vthe discharge opening or vent 56 in the condenser 55 determines the temperature that is available with the valve operating mechanism it, and the pointer 52 and'scale GQ merel-y transposes the size of the ydischarge openi'nglor vent 5% into direct temperature l,ieadings for the convenience of the operator.

`In assembling the various parts of the apparatus shown in Figs. 2, 3 and 4, the regular l valveoperating ii'fechanism (not shown) of a confventional globe valve' is removed from its valve casing It 'a conventional steam heating system, and the sleeve or casing member i8* is threaded thereinto A'by means of. its threaded shoulder'. The piston member Sil is positioned within the sleeve i8, with its projecting tubelZ-il extending -`upwardly and vthrough the einer epenng at 'of the `esp member t2, Whieh is `"in turnfthreaded into the top "of 'the lsleeve l'F8 on the threads i'thereo'f. The 'connecting pipe l 'd8 is then threaded into the top of 'the cap .inemthe valve mechanism it. y e

In describing the actual operation ofthe ap'- ber. Sil-, thereby connecting thefcondenser Y into 't paratus shown infiigs. l, 2, 3 ande, it is 'to be `assumed that radiator and roomfare cold; thatthere ismaintained alco'nstan't 'steam pres'- -sure in the boiler it and pipes i2; and that the discharge venti-56 on` the condenseri is vnow turned until a partial openingis effected therein.

The steam pressure 'inthe boiler :il cause steam to rise` into the valve mechanism 4li,vior`c ing the'piston tothe topof the sleeve A'IB and at the saine timeiorciig a small portion rvof the first 'forcing the air therein out through the open vent 56. yAs scones .the piston is forced upwardly in 'the 'sleeve it, .the radiator inlet ports 24 are uncovered or opened and theL steam pressure in the system likewise forces a major portion of 'the steam entering'the valve casing l'ESffrom thepipe i2 into the radiator l il, and at the same time the entrapped air within said radiator Vis forced out through its conventional airvent valve il, as best shown 4in Fig. 8. The steam entering into the reuiiatorl it mar'iifestly will heat upethe same,

forced out of the condenser 55 through its discharge vent et, the steei entering into and lling the condenser will likewise 4begin to iischargel into the atmosphere in `the room. However, a major portieri of the-steanrentering into the condenser E, until the latter'fizs4 heated to the 'temperature required to prevent condensation thereof, will be` condensed the `coolness of the sidewalls oilthefcondenser 55, which in turn are directly affected by the coolness vof the temperature o the surrounding air in Vsaid room As the temperature in the roomrises due to the radiation of heat 'from Vthe radiator, less and less steam will be condensed in the condenser 555, and by reason of the 'relatively small size oi the dischargecope'ni'ng tit in"the'condenser 'as compared to the` inletbonnecting pipe 4.8, ja

pressure i's gradually beingbuilt up vinthe con' .'steamup throughthe projecting tube di) linto the I connecting pipe t and condenser T95, thereby at its fro

l l thereon iall to the bottom of the sleeve or casing HI8, thereby closing off the inlet ports 24 through which steam must be passed to the radiator I0. It is an ob-vious fact that as the temperature of the room againgcools down, because of the shutting olic of the steam supply to the radiator IU, more and more condensation of steam will take place in the condenser 55, thereby causing a lowering of the built up pressure therein. When this built up pressure in the condenser 55 is reduced to a point sufficiently below the pressure `existing in the steam pipe I2, the difference' in pressure below `and above the-piston 3U will again be suiicient to raise the piston 30, therebyagain opening the ports 24 and allowing steam to again pass into the radiators Il). This same cycle of operation will continue indefinitely and as long as there is steam pressure in the supply line I2 for a given setting of' the discharge vent or open-- ing 56.` However, by increasing or decreasing the size of the discharge vent or opening 56 in the condenser 55, it is possible to control and/or regulate the time required to build up a pressure above the piston 35, and in this manner the time in which steam is permitted to flow from the boiler II `directly into the steam radiator lil through the pipes l2 is controlled, resulting in a controlled room temperature. Therefore, the temperature markings on the indicator 52 must be predetermined for the temperatures desired, and graduated in accordance with suoli predetermined i markings into indicia which will convey to the operator the temperature obtainable with the settings of the valve 58 controlling the size of the opening oi the discharge vent 5S.

` The water resulting from the condensation of the steam in the condenser 55 will tend to flow down the sides thereof and back into` the connecting pipe 43 and into the valve unit I5. Upon reaching the sleeve I8, this water will flow across the top of the piston Sil, when the lat- `ter is in its uppermost position, through the paratus is substantially identical to that showiny in Fig. 2, except that the piston 33 is mounted within the outer sleeve or casing I8 in an inverted position, with its projecting tube 4l! ex- `tending downwardly into the valve casing i3 and into the steam inlet pipe l2 instead of upwardly into the connecting condenser pipe 48. In this arrangement the drainage of the condensation in the system. above the piston 3G is into the cupped portion of the piston 3E) and downwardly through the projecting tube 40 instead of bctween the sides of the piston 3@ and the side- Wall of the sleeve or casing I8. In all other respects, the operation of the mechanism is `identical to that heretofore described and need '25 ,not berepeated here.

Referring to Fig. 6 of the drawings, there is shown another form of the invention, wherein the condenser 55-a is fashioned from the connecting pipe 4B by plugging the outer end thereof with a conventional pipe plug lll, and providing a discharge vent or opening 'l2 in the side thereof adjacent said plugged end. The discharge vent l2, in this arrangement, is provided with a conventional bi-metallic thermostatic bar '54, such as are commonly employed in` thermostatic apparatus, for thermostatically opening and/or closing the same. It is well understood that such bars dpby reason ofthe different co-enicients of expansion of the two metals or substances employed, bend or flex one way under a rise of temperature, and in the reverse drection on` the fall of temperature. One end of the bar 14 is secured to the pipe 48, as indicated at lli, and the other or free end is provided with a suitable needle-like valve 16. After initial setting or adjustment, the thermostatc bar I4 will open the dischargevent 'l2 atlone given temperature and will close the same atanother given temperature. In this arrangement, a relatively small condenser `55-a is required, which may consist merely of the connecting pipe 48, since the bri-metallic thermostatic bar .'54 will open and close the discharge vent l2 quickly and ehciently at the desired temperatures for which it is adjusted. When the vent 'l2 is closed pressure will be buit up in the pipe 48 or `condenser 55---0Ly until itis equal to or greater than the pressure below the piston 3l), and the latter will drop by reason of its own weight and gravity closing the ports 24 and shutting off the steam supply to the radiator Il). However, when the room temperature cools down suiiciently to cause the thermostatic bar 'I4 to open the discharge vent l2, the pressure above the piston 3B will be reduced sufliciently below the pressure in the steam, line I2, and the latter will force the piston 3d to the top of the cylindrical sleeve i8 thereby uncovering the ports 24` and permitting a supply of steam to low again into the radiator Illv from the pipes I2 until such time as the temperature of the room `again affects the thermostatic bar 'i4 in such a manner as to cause the needle-like valve i6 to again close the discharge vent l2 and permit the pressure to build up in the condensing chamber 55-a until it is equal tov the pressure in the` steam pipes I 2, thereby allowing the piston to drop and close said ports 24 to the radiator I0. Referring now to Fig, '7 of the drawings, there is shown another form which the invention may assume, in which two automatic valve control units I6 are shown connected in series with each other and the supply line I2 and in parallel with the radiator I0, the lower or main valve unit I6-a being connected directly to the bottom of `the radiator I0 in the same manner as its corresponding `valve unit I6 in the previously described installations. However, the upper or intermediate control valve unit I6--b, which is substantially identical in construction to the unit I6 of the previous forms, is directly connected to the top of the same radiator I0, as indicated at 19, and this second control valve unit receives its supply of steam from the connecting pipe 48--a leading from the main valve unit I E-a.

`The connecting condenser pipe 1B-b, leading from the top oi the second or intermediate unit Iii-b, is connected to a condenser -b\, which is shown in a slightly modied form as being` of a telescopic construction. This telescopic condenser member 55--13` consists of a stationary [indicate the exact positions of the slidable membe'r 32 with respect to the end of the stationary `rn'cmber til for obtaining the room temperatures indicate-d thereon. .In this construction, itr will be 'apparent that the valve unit l -b will remain open whenever the temperature in the room is l'ow enough to keep the pressure in the condensy'ing chamber v.E5-b suiiiciently lower than the pressure in 'the main supply line i2; and that the main valve unit l i--a'will remain open whenever the pressure in the radiator I0 is suiciently lower than the pressure in the vmain sup-ply line l'to l2, and will close only when the pressure in the radiator lil is nearly equal to the pressure inthe main supply line l2. 'open again whenever the radiator lil has cooled sucie'ntly to reduce the pressure therein below the pressure in the main supply line l2. Obviously, the operation of the valves l-a and lil-b are identical with the operation of the valve i6, except, however, for their opening and closing operations which are hereinabove described. The valve iii-b may be much smaller than the valve Iii-11, thereby permitting only a very small amount of steam to escape into the condenser line -b, the balance of the steam necessary for opening the valve iii-ct passing directly to the radiator i0 through the line l when the valve Iii-a` is open. vIt is apparent that the double valve installation is capable of operating with a much smaller condenser, and for that reason may be found preferable in many instances.

The drawings illustrate the invention only in connection with a single line steamheating system, but it is to be understood that it is also adaptable for 'use with a double line steam heating system. In fact experience has shown that the invention has slightly greater eiciency with a double or return line steam heating system than with a single line steam heating system.

While I have shown and described several lforms -oi condensers 55, l-a and t5-b in connection with the several forms of installations show-n in the drawings, it is to be understood that these forms are shown anddescribed for the purpose 'of illustration only and are not limited to the particular installation with which lthey have :been depicted and described, but are interchangeable.

Although I'have only described in detail several modifications which the invention may assume, it will be apparent to those skilled lin the art that the invention 'is not so limited, -but that variousother modificationsmay be `ma'detherein Vwithout `departing from the spirit thereof or from the scope of the appended claims.

What I claim is:

1. In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent, and a steam pressure 'operable inlet valve having ports 'for connecting said steam r'supply line'to said radiator and said condensing chamber.

`2. In combination 'with a steam 'heating .sys-

The valve unit lS-a Willtem, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge Vent, means for opening and closingr said discharge vent, and a steam pressure operable inlet valve having ports for connecting said steam supply line to said radiator and to said 'condensing chamber.

3. In combination with a steam heating systern, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent, thermostatically operable means for openingand closing said discharge vent, and a steam pressure Aoperable inlet valve having ports for connecting said steam supply line to said radiator'and to said condensing chamber.

4. In combination with a .steam heating systern, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent, means for manually varying the size of said discharge vent, anda steam pressure operable 'inlet valve having ports for connecting .said steam supplyv line to said radiator and to said condensing chamber.

5. In combination with a steam heating system, a steam radiator, a steam supply line, an adjustable steam condensing chamber having an atmospheric discharge vent, and 2a steam pressure operable inlet valve having ports for connecting said steam supply line to said radiator and to said condensing chamber.

6. In combination with a steam heating system, a steam radiator, a steam lsupply line, a steam condensing chamber ci substantial surface area condensing chamber is below the steam pressureof said supply line.

7. In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber of substantial surface area having an atmospheric discharge vent, and a steam pressure operable inlet valve of a sleeve type construction having ports adjacent its steam receiving end for admitting steam to said radiator when the steam pressure in said line is greater than the pressure in `said condensing chamber and a port beyond said radiator ports and adjacent its opposite end which is always in open communication with `said condensing chamber.

8. In combination with'a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber, a steam pressure operable inlet valve having ports for connecting said steam supply line to the base of said radiator and :also having a port extending therethrough and connecting saidsteam supply line to a :second steam pressure operable inlet valve, said second steam pressure Valve having ports for connecting the steam supply line to the top .of said'r-.adiator and also having a port extending therethrough and connecting said steam supply line to said Ycondensing chamber.

9. rIn combination with alsteam heating system,

a steam radiator, a steam supply line, a steam said steam supply line to the base of said radiator and also having a port extending therethrough and connecting a second steam pressure operable pressure operable inlet valves connected in parallel to said steam radiator and in series with said condensing chamber, said first inlet valve having ports for connecting the steam supply line to the base of said radiator when the steam pressure in said supply line is greater than the pressure above said valve, said rst valve having aport above said radiator ports which is always in communication with said second inlet valve, and said second inlet valve having ports connecting its steam supply line from said iirst valve to the top of said radiator when the pressure in its supply line is greater than the pressure in said condensing chamber, said second valve having a port above `its radiator ports which is always in communication with said condensing chamber.

lll. Incombination with a steam heating system, a pressure operable regulating valve which comprises a tubular sleeve having its lower edge adapted to be mounted within the casing of a conventional globe valve connecting a steam radiator to a steam supply line, said tubular sleeve having ports adjacent its lower edge opening into said radiator, a; cap for closing the upper open end of said sleeve, said cap having an axial opening therethrough for receiving a discharge line, and a piston slidably mounted invsaid tubular sleeve having a discharge tube axially mounted through said closed end and projecting into said discharge line at all positions of said piston.

12. In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent, anda piston type steam pressure operable regulating valve connecting said steam supply line to said radiator, said piston having an opening therethrough for allowing passage of a small portion of the steam from said supply lineto said condensing chamber at all positions of said piston valve.

13. In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber having an'atmospheric discharge vent, and a piston type steam pressure operable regulating valve connecting said steam supply line to said radiator, said piston operating to open the ports to said radiatorby the pressure in said supply line and to close said ports by gravitational force induced by its own weight when the pressure in the condensing chamber becomes sufliciently great to equalize the pressure in the supply line.

14. In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent, and a steam pressure operable control valve connecting said steam supply line to said radiator, said valve having a port open at all positions to said steam condensing chamber for passing a portion of the steam in said supply line to said condensing chamber whenever there is pressure in said supply line. s

15, In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent provided with means for varying its size, and a steam pressure operable control valve connecting said steam supply line to said radiator, said valve having a port open at all positions to said steam condensing chamber for passing a portion of the `steam in said steam supply line to said condensing chamber whenever there is pressure in said supply line.

16. In combination with a steam heating system, apiston type steam pressure operable regulating valve for connecting a steam radiator to a steam supply line, said valve comprising a tubular sleevehaving its lower edge adapted to be mounted Within the casing of a conventional globe valve and its opposite end closed, a discharge line leading from its closed end forconnecting said valve to a condensing chamber, a piston slidably mounted within said sleeve having an opening extending therethrough for passing steam from said supply line at all times to said discharge line, and a condensing chamber mounted on the opposite end of said discharge line having an atmospheric vent for permitting the escape of steam therefrom.

1'7. In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent provided with thermostatically operable means for opening and closing the same, and a steam pressure operable control valve connecting said steam `supply line to said radiator, said valve having a port open at all positions to said steam condensing chamber for passing a portion of the steam in said steam supply line to said condensing chamber whenever there is pressure in said supply line.

18. In combination with a steam heating system, a steam radiator, a steam supply line,"a steam condensing chamber having an atmospheric discharge vent provided with thermostatically operable means for opening and closing the same, and a piston type steam pressure operable control valve connecting said steam supply line to said radiator, said valve having a port open at all positions of said piston for passing steam to said condensing chamber whenever there is pressure in said supply line.

19. In combination with a steam heating system, a steam radiator, a steam supply line, a

s steam condensing chamber `having an atmospheric discharge vent, a main steam pressure operable inlet valve connecting said steam supply line to the base ofsaid radiator and having an opening therethrough connecting said steam supply line to a steam pressure operable control valve, said control valve having ports connecting the steam line from the main valve to the top of said radiator and having an opening therethrough connecting the steam line from the main valve to said condensing chamber.

20. `In combination with a steam Vheating system, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent, a piston type main steam pressure operable inlet valve connecting said steam supply line to the base of said radiator and having a passage extending therethrough for connecting` said steam supply line to a piston type steam pressure operable control valve, said control valve having ports connecting the steam. line from the main valve to the top of said radiator and also having a passage extending therethrough for connecting thesteam line from the main valve to said condensing chamber. i

' 2l. In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber having an atmospheric discharge vent, a piston type main steam pressure operable inlet valve connecting said steam supply line to the base of said radiator and having a passage extending through the piston head for connecting said steam supply line to a piston type steam pressure operablel control valve, said control valve having ports connecting the steam line from the main valve to the topy of said radiator and having a passage extending through its piston'head for connecting the steam line from the main valve to said condensing chamber.

22. In combination with a steam heating system, a steam radiator, a steam supply line, a steam condensing chamber which is adjustable as to size having an atmospheric discharge vent, a main steam pressure operable inlet valveconnecting said steam supply line to the base of said radiator and having an opening therethrough connecting said steam supply line to a steam pressure operable control valve, said control valve having ports connecting the steam line from the main valve to the top of said radiator and having an opening therethrough connecting the steam line from the main valve to said condensing chamber.

23, In combination with a steam heating system, a steam radiator, a steam supply line', a telescopically adjustable condensing chamber having an atmospheric discharge vent, a main steam pressure operable inlet Valve connecting said steam supply line to the base of said radiator and having an opening therethrough connecting said steam supply line to a steam pressure operable control valve, said control valve having ports connecting the steam line from the main valve to the top= of said radiator and having an opening therethrough connecting the steam line from the main valve to said condensing chamber.

2a. In combination with a steam heating system, a pressure operable regulating main valve which comprises a tubular sleeve having its lower edge adapted to be mounted Within the casing of a conventional globe valve connecting a steam radiator to a steam supply line, said tubular sleeve having ports adjacent its lower edge opening into said radiator, a cap for closing the upper open end of said sleeve having a passage therethrough. for receiving a discharge line, a piston slidably mounted in said tubular sleeve having a discharge tube mounted through its head and projecting into said discharge line at all positions of said piston, a pressure operable control valve mounted on the opposite end of said discharge line, said control valve having a casing connecting said discharge line from the main valve to the upper side of the steam radiator, a tubular sleeve having its lower edge adapted to be mounted in the casing oi a conventional globe valve and having its opposite end closed, a pipe extending through said closed end and connecting with a condensing chamber having an atmospheric discharge vent, a piston slidably mounted in the tubular sleeve of said control valve having a discharge tube mounted through its head and projecting into said condenser pipe at all positions of said piston.

- JOHN W, WEST. 

